healthThreshold
The number of child health checks that are associated with a CALCULATED health that Amazon Route 53 must consider healthy for the CALCULATED health check to be considered healthy. To specify the child health checks that you want to associate with a CALCULATED health check, use the ChildHealthChecks and ChildHealthCheck elements.
Note the following:
If you specify a number greater than the number of child health checks, Route 53 always considers this health check to be unhealthy.
If you specify
0, Route 53 always considers this health check to be healthy.